Test | Đạo hàm | Cơ bản 1. $f'(a)=$ A. $underset{xrightarrow a}{lim}frac{f(x)-f(a)}{x-a}$ B. $underset{xrightarrow a}{lim}frac{f(a)-f(x)}{a-x}$ C. $underset{brightarrow a}{lim}frac{f(b)-f(a)}{b-a}$ D. $underset{xrightarrow 0}{lim}frac{f(x+a)-f(a)}{x}$ Đáp án câu 1 A, B, C, D 2. $f'(2)=$ A. $underset{xrightarrow 2}{lim}frac{f(x)-f(2)}{x-2}$ B. $underset{xrightarrow 2}{lim}frac{f(2)-f(x)}{2-x}$ C. $underset{brightarrow 2}{lim}frac{f(b)-f(2)}{b-2}$ D. $underset{xrightarrow 0}{lim}frac{f(x+2)-f(2)}{x}$ Đáp án câu 2 A, B, C, D 3. Cho $f(x)=x^2$. Ta … Continue reading Test | Đạo hàm | Cơ bản
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